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The bigger the boom, the better! At the highest ranks, a proficient expert can craft a potent bomb or ten and lob them all at even the most dangerous of marauding foes, dropping the enemy before engaging in closer combat. Are you a fan of mines? Do you enjoy using V.A.T.S. to shoot grenades or mines close to or carried on an enemy? Then think about this perk.Fallout 4 Vault Dweller's Survival Guide description

Demolition Expert is a perk in Fallout 4.


Increasing damage by explosives.


Rank Requirements Description Form ID
1 PER 5 The bigger the boom, the better! Your explosives do 25% more damage, and you can craft explosives at any Chemistry Station. 0004C923
2 PER 5, LVL 10 Your explosives do 50% more damage, and grenades gain a throwing arc. 0004C924
3 PER 5, LVL 22 Your explosives do 75% more damage and affect a larger area. 0004C925
4 PER 5, LVL 34 Your explosives now do double damage. Mines and grenades shot in V.A.T.S explode for double damage, too. 00065E13

The perk affects most thrown grenades, mines, explosive weapons and weapons with the Explosive legendary effect. However, it only affects the primary damage type of a weapon. For example, a grenade that deals two types of damage only has its primary damage increased. This also means the perk does not affect the damage of pulse mines and pulse grenades, as they only deal secondary energy damage.

Weapons affected by this perk:
Artillery shells Baseball grenade Big Boy Bottlecap mine
Broadsider Cryo mine Cryogenic grenade Cryolator3
Death From Above Fat Man Fragmentation grenade Fragmentation grenade MIRV1
Fragmentation mine Gamma gun HalluciGen gas grenade Homing beacon
Institute beacon Kiloton radium rifle2 Lorenzo's Artifact gun Missile launcher
Molotov cocktail Nuka grenade Nuka-nuke launcher1 Nuka Quantum grenade1
Nuke mine Plasma grenade Plasma mine Smart fragmentation grenade1
Spray n' Pray Thirst Zapper1,4 Zeta gun

1 Nuka-World (add-on) weapon. - 2 Far Harbor (add-on) weapon. - 3 Only with crystallizing barrel modification equipped. - 4 Only with Cherry gun or Quantum gun modification equipped.


The perk is also a requirement in order to craft certain types of explosives, as well as the Nuka-World armor modification "Dense" and the explosives mill from the Contraptions Workshop add-on.

Rank Unlocked item
1 Baseball grenade, bottlecap mine
2 Cryogenic grenade, cryo mine, fragmentation grenade, fragmentation mine, Dense armor mod, explosives mill
3 Pulse grenade, pulse mine
4 Plasma grenade, plasma mine


  • With rank two, the "gain a throwing arc" effect shows a green arrow, indicating a grenade's trajectory and initial landing point.
  • Rank three increases the explosion radius by 25%.
  • This perk does not affect the explosive vent power armor mods.